Do I have to use the insurance offered through GACC California's third party insurance agency?

No, the insurance offered through our licensed insurance agent(s) is optional. However, it is very important to be fully insured, and you will be required to present sufficient insurance. Carefully review all insurance policies and their coverage terms. If you already have an insurance policy in place for your stay in the U.S., but you have questions about the policy, please do not hesitate to contact us, as we are more than happy to provide you with further feedback.